| Captain Christopher from the TOS episode 'Tomorrow is Yesterday'. They went back in time and picked up the fighter pilot. The fighter pilot was Captain John Christopher. His, yet to be born, son Colonel Shaun Geoffrey Christopher.
From Memory Alpha:
Colonel Shaun Geoffrey Christopher was the son of US Air Force Captain John Christopher. Colonel Christopher was the commander of the first successful Earth-Saturn probe, a manned mission to Saturn, in the late 20th or early 21st century. |